M87X datasheet(21/148 Pages) ALSTOM

21 / 148 page

User Manual

M87x/EN M/K

M87x

Page 19

Input Signals (S13, S14, S15 S16, S17)

Peak Current

Linear to 20A symmetrical (28A peak)/linear to 100A symmetrical (141A peak) at all rated temperatures.

Overload

30Aac continuous. Withstands 400Aac for 2 seconds.

Isolation

2500Vac, minimum.

Burden

0.04VA @ 5A rms, 60Hz (0.0016ohms @ 60Hz).

(continued)

Frequency

15-70Hz

Configuration

6 Inputs. 3 Phase Currents from 2 Lines with different peak current ranges.

Nominal

1Aac

Peak Current

Linear to 4A symmetrical (5.7A peak)/linear to 20A symmetrical (28A peak at all rated temperatures.

Overload

30Aac continuous. Withstands 400Aac for 2 seconds.

Isolation

2500Vac, minimum.

Burden

0.0016VA @ 1A rms, 60Hz (0.0016ohms @ 60Hz).

CT Current Inputs (S17)

M872 with dual peak

ranges 4A/20A

Frequency

15-70Hz

Configuration

8 Inputs, Measures 2 Buses, 3 or 4 Wire

Nominal

120Vac

System Voltage

Intended for use on nominal system voltages up to 480V rms phase-to-phase (277V rms phase-to-neutral)

Peak Voltage

Reads to 600V peak (425V rms), input-to-case (ground)

Impedance

>7.5MΩ, input-to-case (ground)

Voltage Withstand

2.5kV rms 1min, input-to-case (ground)

2kV rms 1min, input-to-input

VT (PT) AC Voltage

Inputs (S13, S14, S15,

S16, S17) Terminals 9

to 16

Frequency

15-70Hz

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